kubernetes - 如何从 kubernetes pod 获取 configmap

Question

我有一个 Spring Boot 微服务在 docker 容器上运行，下面是 Dockerfile

FROM java:8-jre
MAINTAINER <>
WORKDIR deploy/
#COPY config/* /deploy/config/
COPY ./ms.console.jar /deploy/
CMD chmod +R 777 ./ms.console.jar
CMD ["java","-jar","/deploy/ms.console.jar","console"]
EXPOSE 8384

这里我的配置存储在外部文件夹中，即/config/console-server.yml，当我启动应用程序时，它会在内部加载配置(Spring Boot功能)。

现在我想使用 configmap 分离此配置，因为我只需创建一个 configmap 并存储所有配置详细信息。

kubectl create configmap console-configmap --from-file=./config/console-server.yml

kubectl describe configmap console-configmap

以下是详细描述:

Name:         console-configmap
Namespace:    default
Labels:       <none>
Annotations:  <none>

Data
====
console-server.yml:
----
server:
  http:
    port: 8385
  compression:
    enabled: true
    mime-types: application/json,application/xml,text/html,text/xml,text/plain,text/css,application/javascript
    min-response-size: 2048

---
spring:
  thymeleaf:
    prefix: classpath:/static
  application:
    name: console-service
  profiles:
     active: native
  servlet:
    multipart:
      max-file-size: 30MB
      max-request-size: 30MB
---
host:
  gateway: http://apigateway:4000
  webhook: http://localhost:9000

我的部署 yml 是:

apiVersion: apps/v1 # for versions before 1.8.0 use apps/v1beta1
kind: Deployment
metadata:
  name: consoleservice1
spec:
  selector:
    matchLabels:
      app: consoleservice
  replicas: 1 # tells deployment to run 3 pods matching the template
  template: # create pods using pod definition in this template
    metadata:
      labels:
        app: consoleservice
    spec:
      containers:
      - name: consoleservice
        image: ms-console
        ports:
        - containerPort: 8384
        imagePullPolicy: Always
        envFrom:
        - configMapRef:
            name: console-configmap
      imagePullSecrets:
        - name: regcresd

我的疑问是，我在 Dockerfile 中评论了配置文件夹，因此在运行 pod 时，由于没有配置而引发异常，我如何将此控制台配置映射注入(inject)到我的部署中，我尝试过的内容已经共享，但遇到了相同的问题.

Answer 1

首先，您如何在应用程序中使用 .yml 文件？如果您使用 yml 文件内容作为环境变量，您的配置应该可以正常工作。但我怀疑您想使用容器内配置文件中的内容。如果是这种情况，您必须从配置映射中创建一个卷，如下所示:

apiVersion: apps/v1 # for versions before 1.8.0 use apps/v1beta1
kind: Deployment
metadata:
  name: consoleservice1
spec:
  selector:
    matchLabels:
      app: consoleservice
  replicas: 1 # tells deployment to run 3 pods matching the template
  template: # create pods using pod definition in this template
    metadata:
      labels:
        app: consoleservice
    spec:
      containers:
      - name: consoleservice
        image: ms-console
        ports:
        - containerPort: 8384
        imagePullPolicy: Always
        volumeMounts:
          - mountPath: /app/config
            name: config
      volumes:
        - name: config
          configMap:
            name: console-configmap
      imagePullSecrets:
        - name: regcresd

该文件将在路径 /app/config/console-server.yml 中提供。您必须根据您的需要对其进行修改。